APA (7th ed.) Citation

Villaverde, J. F., Beyer, H. O., Garvan, J. M., & Christie, E. B. Superstitions of the Ifugao Igorots.

Chicago Style (17th ed.) Citation

Villaverde, Juan Fernandez, Henry Otley Beyer, John M. Garvan, and Emerson B. Christie. Superstitions of the Ifugao Igorots.

MLA (9th ed.) Citation

Villaverde, Juan Fernandez, et al. Superstitions of the Ifugao Igorots.