Cita APA (7a ed.)

Maurel, A., & Gerard, H. (1921). A fortnight in Naples. G. P. Putnam's sons.

Cita Chicago Style (17a ed.)

Maurel, Andre, y Helen Gerard. A Fortnight in Naples. New York: G. P. Putnam's sons, 1921.

Cita MLA (9a ed.)

Maurel, Andre, y Helen Gerard. A Fortnight in Naples. G. P. Putnam's sons, 1921.