APA (7e ed.) Bronvermelding

Downie, N., & Heath, R. W. (1970). Basic statistical methods (3rd ed.). Harper & Row.

Chicago (17e ed.) Bronvermelding

Downie, N.M, en R. W. Heath. Basic Statistical Methods. 3rd ed. New York: Harper & Row, 1970.

MLA (9e ed.) Bronvermelding

Downie, N.M, en R. W. Heath. Basic Statistical Methods. 3rd ed. Harper & Row, 1970.