Cita APA (7th ed.)

Diettrich, S. d. [. o. c. (1961). The Philippine Islands. N. Doubleday.

Cita Chicago (17th ed.)

Diettrich, Sigismond deR. [from old catalog]. The Philippine Islands. Garden City, N.Y: N. Doubleday, 1961.

Cita MLA (9th ed.)

Diettrich, Sigismond deR. [from old catalog]. The Philippine Islands. N. Doubleday, 1961.