Dyfyniad APA

Comstock, A. B. (1941). Handbook of nature-study QH53 .C7. Comstock Publishing.

Dyfyniad Arddull Chicago

Comstock, Anna Botsford. Handbook of Nature-study QH53 .C7. Ithaca, New York: Comstock Publishing, 1941.

Dyfyniad MLA

Comstock, Anna Botsford. Handbook of Nature-study QH53 .C7. Comstock Publishing, 1941.

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