Gaya APA

Beyer, T, R. (2007). 501 english verbs : fully conjugated in all the tenses in an easy-learn format alphabetically arranged . Jakarta: Binarupa Aksara.

Gaya MLA

Beyer, Thomas, R.. "501 english verbs : fully conjugated in all the tenses in an easy-learn format alphabetically arranged". Jakarta: Binarupa Aksara, 2007. Text.