Cita APA (7th ed.)

Beyer, T. R. (2013). 501 English verbs: Fully conjugated in all the tenses in a easy-to-learn format, alphabetically arranged (3rd. ed.). Barron's Educational Series.

Cita Chicago (17th ed.)

Beyer, Thomas R. 501 English Verbs: Fully Conjugated in All the Tenses in a Easy-to-learn Format, Alphabetically Arranged. 3rd. ed. New York: Barron's Educational Series, 2013.

Cita MLA (9th ed.)

Beyer, Thomas R. 501 English Verbs: Fully Conjugated in All the Tenses in a Easy-to-learn Format, Alphabetically Arranged. 3rd. ed. Barron's Educational Series, 2013.