Gaya APA

Sandhu, G., Harshvardhan, I, B. (2003). An Introduction to echinodermata . New Delhi: New Delhi: Campus Books, 2003.

Gaya MLA

Sandhu, G.S., Harshvardhan, I., Bhaskar,. "An Introduction to echinodermata". New Delhi: New Delhi: Campus Books, 2003, 2003. Text.