APA (7th ed.) Citation

Penecilla, G. L. (2003). Basic concepts in biology. Trinitas Pub.

Chicago Style (17th ed.) Citation

Penecilla, Gerard L. Basic Concepts in Biology. Bulacan: Trinitas Pub, 2003.

MLA (9th ed.) Citation

Penecilla, Gerard L. Basic Concepts in Biology. Trinitas Pub, 2003.