APA (7e ed.) Bronvermelding
Tuckman, H. P., Coyle, S., & Bae, Y. (1990). On time to the doctorate: A study of the increased time to complete doctorates in science and engineering. National Academy Press.
Chicago (17e ed.) Bronvermelding
Tuckman, Howard P., Susan Coyle, en Yupin Bae. On Time to the Doctorate: A Study of the Increased Time to Complete Doctorates in Science and Engineering. Washington, D.C.: National Academy Press, 1990.
MLA (9e ed.) Bronvermelding
Tuckman, Howard P., et al. On Time to the Doctorate: A Study of the Increased Time to Complete Doctorates in Science and Engineering. National Academy Press, 1990.
Let op: Deze citaties zijn niet altijd 100% accuraat.