APA

Aggarwal S., . (1997). A textbook of biology. newdeihi: Viskas publishingy.

Chicago

Aggarwal Sarita, . 1997. A textbook of biology. newdeihi: Viskas publishingy.

Harvard

Aggarwal S., . (1997). A textbook of biology. newdeihi: Viskas publishingy.

MLA

Aggarwal Sarita, . A textbook of biology. newdeihi: Viskas publishingy. 1997.