APA (7th ed.) Citation

Boxer, C. R. (1969). The Portuguese seaborne empire, 1415-1825 ([1st American ed.].). A. A. Knopf.

Chicago Style (17th ed.) Citation

Boxer, C. R. The Portuguese Seaborne Empire, 1415-1825. [1st American ed.]. New York: A. A. Knopf, 1969.

MLA (9th ed.) Citation

Boxer, C. R. The Portuguese Seaborne Empire, 1415-1825. [1st American ed.]. A. A. Knopf, 1969.