APA (7th ed.) Citation

Arjona, D. K., Carvajal, E. P., & Friedman, R. L. (1940). Spain and America. [publisher not identified].

Chicago Style (17th ed.) Citation

Arjona, Doris King, Esther Pérez Carvajal, and Rose Lovenhart Friedman. Spain and America. Chicago, Atlanta [etc.]: [publisher not identified], 1940.

MLA (9th ed.) Citation

Arjona, Doris King, et al. Spain and America. [publisher not identified], 1940.