APA استشهاد

Warrier, P. A. (1980). Yohan Guttenberg, Alexander Grahambell (Ed.3.).

استشهاد بنمط شيكاغو

Warrier, P A. Yohan Guttenberg, Alexander Grahambell. Ed.3. Kottayam, Kairali Book Trust, 1980.

MLA استشهاد

Warrier, P A. Yohan Guttenberg, Alexander Grahambell. Ed.3. 1980.