Here's an interesting article combining interview with projective technique:
Bagnoli, A. (2009). Beyond the standard interview: The use of graphic elicitation and arts-based methods. Qualitative Research, 9, 547-570.
For more general information, under the following link you can download a handbook on qualitative research practice; chapter 5 may be of special interest:
This book has information - search for the term - it is mentioned frequently, but particularly p.128:
Ritchie, J., Lewis, J., Nicholls, C. M., & Ormston, R. (Eds.). (2003). Qualitative research practice: A guide for social science students and researchers. Sage.
Also see the below papers - the author of the first two are ResearchGate members:
Donoghue, S. (2000). Projective techniques in consumer research. Journal of Family Ecology and Consumer Sciences/Tydskrif vir Gesinsekologie en Verbruikerswetenskappe, 28(1), 47-53 .
Boddy, C. (2005). Projective techniques in market research: valueless subjectivity or insightful reality. International Journal of Market Research, 47(3), 239-254.
Also some good resources available from Google Scholar, including a nice paper by Sanderlowski, this is the URL for the search: https://scholar.google.com.au/scholar?hl=en&as_sdt=0,5&q=projective+data+collection
Thank you so much those of you who quickly respond to my question and provide me citation where can I get publications regarding projective techniques.
You got some great help already. Anyway, I am using a projective test call the story drawing by Walter Trinca. There are also the draws of family, same author. They can help know what the patient is not verbalizing. Good luck.
I must preface by saying that I retired decades ago and have not kept up with the literature. But you should acquaint yourself with the work of the father of understanding, working with, and developing qualitative analysis of data collected in individual testing, David Rapaport. See my revision of his pioneering work: Diagnostic psychological testing, by David Rapaport, Merton M.Gill, and Roy Schafer, revised & edited by Robert R. Holt. NY: International Universities Press, 1968.