APA استشهاد

Topping,J. (1955). Errors of observation and their treatment (4.). Chapman.

استشهاد بنمط شيكاغو

Topping,J. Errors of Observation and Their Treatment. 4. London: Chapman, 1955.

MLA استشهاد

Topping,J. Errors of Observation and Their Treatment. 4. Chapman, 1955.