APA استشهاد

(2014). P. S. C. previous questions and answers in civil engineering (3rd ed.). Electron College of Technology.

استشهاد بنمط شيكاغو

P. S. C. Previous Questions and Answers in Civil Engineering. 3rd ed. Kollam: Electron College of Technology, 2014.

MLA استشهاد

P. S. C. Previous Questions and Answers in Civil Engineering. 3rd ed. Electron College of Technology, 2014.