APA

Diffie B. W., . (1960). Prelude to empire: Portugal overseas before Henry the Navigator. [Lincoln]: University of Nebraska Press.

Chicago

Diffie Bailey W, . 1960. Prelude to empire: Portugal overseas before Henry the Navigator. [Lincoln]: University of Nebraska Press.

Harvard

Diffie B. W., . (1960). Prelude to empire: Portugal overseas before Henry the Navigator. [Lincoln]: University of Nebraska Press.

MLA

Diffie Bailey W, . Prelude to empire: Portugal overseas before Henry the Navigator. [Lincoln]: University of Nebraska Press. 1960.