APA (7th ed.) Citation

Varona, F. (1990). Negros: Its history and profile. s. n.

Chicago Style (17th ed.) Citation

Varona, Francisco. Negros: Its History and Profile. [S. l: s. n, 1990.

MLA (9th ed.) Citation

Varona, Francisco. Negros: Its History and Profile. s. n, 1990.