Cita APA (7a ed.)

Parker, W. B. (1921). Paraguays of to-day. The Hispanic Society of America.

Cita Chicago Style (17a ed.)

Parker, William Belmont. Paraguays of To-day. London New York: The Hispanic Society of America, 1921.

Cita MLA (9a ed.)

Parker, William Belmont. Paraguays of To-day. The Hispanic Society of America, 1921.