APA (7th ed.) Citation

Wilkins, C. L. (1989). Pero López de Ayala. Twayne Publishers.

Chicago Style (17th ed.) Citation

Wilkins, Constance L. Pero López De Ayala. Boston: Twayne Publishers, 1989.

MLA (9th ed.) Citation

Wilkins, Constance L. Pero López De Ayala. Twayne Publishers, 1989.