APA ציטוט

De Kruif, P., & De Kruif, R. B. (1936). Why keep them alive? Harcourt, Brace and Company.

Chicago Style (17th ed.) Citation

De Kruif, Paul, and Rhea Barbarin De Kruif. Why Keep Them Alive? New York: Harcourt, Brace and Company, 1936.

ציטוט MLA

De Kruif, Paul, and Rhea Barbarin De Kruif. Why Keep Them Alive? Harcourt, Brace and Company, 1936.