APA (7e ed.) Bronvermelding

Ryan, D. W., & Greenfield, T. B. (1975). The class size question: Development of research studies related to the effects of class size, pupil/adult, and pupil/teacher ratios. Ministry of Education.

Chicago (17e ed.) Bronvermelding

Ryan, Doris W., en T. Barr Greenfield. The Class Size Question: Development of Research Studies Related to the Effects of Class Size, Pupil/adult, and Pupil/teacher Ratios. Toronto: Ministry of Education, 1975.

MLA (8e ed.) Bronvermelding

Ryan, Doris W., en T. Barr Greenfield. The Class Size Question: Development of Research Studies Related to the Effects of Class Size, Pupil/adult, and Pupil/teacher Ratios. Ministry of Education, 1975.