Gaya APA

Gradstein, S, R. (2011). Guide to the Liverworts and Hornworts of Java (Ed.1). Bogor: SEAMEO BIOTROP.

Gaya MLA

Gradstein, S., Robbert. "Guide to the Liverworts and Hornworts of Java". Ed.1 Bogor: SEAMEO BIOTROP, 2011. Text.