APA (7e ed.) Bronvermelding

McKellips, R. L. (1977). The role of the language and operations of sets in the elementary arithmetic program. University of the Philippines Library.

Chicago (17e ed.) Bronvermelding

McKellips, Raymond Leon. The Role of the Language and Operations of Sets in the Elementary Arithmetic Program. Quezon City: University of the Philippines Library, 1977.

MLA (9e ed.) Bronvermelding

McKellips, Raymond Leon. The Role of the Language and Operations of Sets in the Elementary Arithmetic Program. University of the Philippines Library, 1977.