APA (7th ed.) Citation

Krugman, Saul, & Ward, R. (1970). Enfermedades Infecciosas Infantiles.

Chicago Style (17th ed.) Citation

Krugman, Saul, and Robert Ward. Enfermedades Infecciosas Infantiles. 1970.

MLA (9th ed.) Citation

Krugman, et al. Enfermedades Infecciosas Infantiles. 1970.

Warning: These citations may not always be 100% accurate.