APA aipamena

Kotpal, R. L. (1983). Porifera: A textbook for college and University students.

Chicago Style aipamena

Kotpal, R L. Porifera: A Textbook for College and University Students. Dept. of Zoology, Meerut College, Meerut, 1983.

MLA aipamena

Kotpal, R L. Porifera: A Textbook for College and University Students. 1983.