APA (7th ed.) Citation

Barreto, M. (1992). The Portuguese Columbus: Secret agent of King John II (1. publ. in the USA.). St. Martin's Press.

Chicago Style (17th ed.) Citation

Barreto, Mascarenhas. The Portuguese Columbus: Secret Agent of King John II. 1. publ. in the USA. New York: St. Martin's Press, 1992.

MLA (9th ed.) Citation

Barreto, Mascarenhas. The Portuguese Columbus: Secret Agent of King John II. 1. publ. in the USA. St. Martin's Press, 1992.