Παραπομπή APA

George Varghese. (2017). Gravity. DC Books Kottayam.

Παραπομπή Chicago Style

George Varghese. Gravity. Kottayam: DC Books Kottayam, 2017.

Παραπομπή MLA

George Varghese. Gravity. DC Books Kottayam, 2017.