APA (7e ed.) Bronvermelding

Perez, G. S. (1976). El historico agujero saltimbanqui [microform]. Photoduplication Service. University of the Philippines Library.

Chicago (17e ed.) Bronvermelding

Perez, Gilbert Somers. El Historico Agujero Saltimbanqui [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1976.

MLA (9e ed.) Bronvermelding

Perez, Gilbert Somers. El Historico Agujero Saltimbanqui [microform]. Photoduplication Service. University of the Philippines Library, 1976.