APA

Johri R. M., Lata S. & Tyagi K. (2005). A Textbook of Gymnosperm. new delhi: Dominant Publishers and Distributors.

Chicago

Johri R M, Lata Sneh and Tyagi Kavita. 2005. A Textbook of Gymnosperm. new delhi: Dominant Publishers and Distributors.

Harvard

Johri R. M., Lata S. and Tyagi K. (2005). A Textbook of Gymnosperm. new delhi: Dominant Publishers and Distributors.

MLA

Johri R M, Lata Sneh and Tyagi Kavita. A Textbook of Gymnosperm. new delhi: Dominant Publishers and Distributors. 2005.