APA (7e ed.) Bronvermelding

Villabona, F. B., & Sison, W. M. (1972). Process approach in teaching science for the educable mentally retarded: Intermediate level.

Chicago (17e ed.) Bronvermelding

Villabona, Fe Bagares, en Waldetrudes Montojo Sison. Process Approach in Teaching Science for the Educable Mentally Retarded: Intermediate Level. 1972.

MLA (9e ed.) Bronvermelding

Villabona, Fe Bagares, en Waldetrudes Montojo Sison. Process Approach in Teaching Science for the Educable Mentally Retarded: Intermediate Level. 1972.

Let op: Deze citaties zijn niet altijd 100% accuraat.