Παραπομπή σε μορφή APA (7η εκδ.)

Johnston, E. G. (1930). Point systems and awards: The guidance, stimulation and limitation of pupil participation. A.S. Barnes and company, incorporated.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Johnston, Edgar Grant. Point Systems and Awards: The Guidance, Stimulation and Limitation of Pupil Participation. New York: A.S. Barnes and company, incorporated, 1930.

Παραπομπή σε μορφή MLA (9th εκδ.)

Johnston, Edgar Grant. Point Systems and Awards: The Guidance, Stimulation and Limitation of Pupil Participation. A.S. Barnes and company, incorporated, 1930.