APA (7e ed.) Bronvermelding

St. Mary's College, Tagum, Davao del Norte, & Silfverberg, R. R. (1992). Business directory: Davao province 1992. Business Resource Center, St. Mary's College.

Chicago (17e ed.) Bronvermelding

St. Mary's College, Tagum, Davao del Norte, en Raymunda Rimando Silfverberg. Business Directory: Davao Province 1992. Tagum, Davao: Business Resource Center, St. Mary's College, 1992.

MLA (9e ed.) Bronvermelding

St. Mary's College, Tagum, Davao del Norte, en Raymunda Rimando Silfverberg. Business Directory: Davao Province 1992. Business Resource Center, St. Mary's College, 1992.