APA (7e ed.) Bronvermelding
Early, G. H. (1969). Perceptual training in the curriculum. C. E. Merrill Pub. Co..
Chicago (17e ed.) Bronvermelding
Early, George H. Perceptual Training in the Curriculum. Columbus, Ohio: C. E. Merrill Pub. Co., 1969.
MLA (9e ed.) Bronvermelding
Early, George H. Perceptual Training in the Curriculum. C. E. Merrill Pub. Co., 1969.
Let op: Deze citaties zijn niet altijd 100% accuraat.