APA

Downie N. M., Health R., . (1983). Basic statistical methods. New York: Harper & Row, Publishers.

Chicago

Downie Norville Morgan, Health R.H, . 1983. Basic statistical methods. New York: Harper & Row, Publishers.

Harvard

Downie N. M., Health R., . (1983). Basic statistical methods. New York: Harper & Row, Publishers.

MLA

Downie Norville Morgan, Health R.H, . Basic statistical methods. New York: Harper & Row, Publishers. 1983.