Kendris, C. (1990). 501 Spanish verbs fully conjugated in all the tenses in a new easy to learn format (3rd edition.). Barron's Educational Series.
Chicago-referens (17:e uppl.)Kendris, Christopher. 501 Spanish Verbs Fully Conjugated in All the Tenses in a New Easy to Learn Format. 3rd edition. New York: Barron's Educational Series, 1990.
MLA-referens (9:e uppl.)Kendris, Christopher. 501 Spanish Verbs Fully Conjugated in All the Tenses in a New Easy to Learn Format. 3rd edition. Barron's Educational Series, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.