St. Mary's College, Tagum, Davao del Norte, & Silfverberg, R. R. (1992). Business directory: Davao province 1992. Business Resource Center, St. Mary's College.
芝加哥风格引文St. Mary's College, Tagum, Davao del Norte, 与 Raymunda Rimando Silfverberg. Business Directory: Davao Province 1992. Tagum, Davao: Business Resource Center, St. Mary's College, 1992.
MLA引文St. Mary's College, Tagum, Davao del Norte, 与 Raymunda Rimando Silfverberg. Business Directory: Davao Province 1992. Business Resource Center, St. Mary's College, 1992.
警告：这些引文格式不一定是100％准确.