I am doing research on the topic regarding the acculturative stress level of adjustment and coping strategies of International students in Pakistani universities. Any kind of help regarding the scales or questionnaires will be appreciated.
I suggest you to please read the work of Zane Nolan and Mak Winnie (2003). Let me also suggest you to study the thesis of a master student, which i hope will help you clear about formulating or adopting standardized questionnaire. Thirdly, you can also read the scale (questionnaire) developed by Daya S. Sandhu (1994).
A preliminary literature search using Google Scholar may be helpful. Coping strategies are broad and multiple. You may need to find a measure which is brief to reduce respondent fatigue, but accurately fits your study objectives and population being studied.