APA (7th ed.) Citation

Richdale, L. E. (1949). A study of a group of penguins of known age. Otago Daily Times and Witness Newspapers Co..

Chicago Style (17th ed.) Citation

Richdale, L. E. A Study of a Group of Penguins of Known Age. Dunedin, N. Z.: Otago Daily Times and Witness Newspapers Co., 1949.

MLA (9th ed.) Citation

Richdale, L. E. A Study of a Group of Penguins of Known Age. Otago Daily Times and Witness Newspapers Co., 1949.