APA (7th ed.) Citation

Sibal, M. (1977). Circular sobre roturaciones. University of the Philippines Library.

Chicago Style (17th ed.) Citation

Sibal, Marcelo. Circular Sobre Roturaciones. Quezon City: University of the Philippines Library, 1977.

MLA (9th ed.) Citation

Sibal, Marcelo. Circular Sobre Roturaciones. University of the Philippines Library, 1977.

Warning: These citations may not always be 100% accurate.