Παραπομπή APA

Gopal, B., & Sharma, K. (1981). Water hyacinth. Hindasia.

Παραπομπή Chicago Style

Gopal, B., και KP Sharma. Water Hyacinth. New Delhi: Hindasia, 1981.

Παραπομπή MLA

Gopal, B., και KP Sharma. Water Hyacinth. Hindasia, 1981.