Dyfyniad APA

Topping, J. (1971). Errors of observation and their treatment (3rd ed.). London.

Dyfyniad Arddull Chicago

Topping, J. Errors of Observation and Their Treatment. 3rd ed. London, 1971.

Dyfyniad MLA

Topping, J. Errors of Observation and Their Treatment. 3rd ed. London, 1971.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.