APA (7th ed.) Citation

Birkelund, T., & Hansen, H. J. (1968). Early shell growth and stuctures of the septa and the siphuncular tube in some maastrichtian ammonites.

Chicago Style (17th ed.) Citation

Birkelund, Tove, and H. J. Hansen. Early Shell Growth and Stuctures of the Septa and the Siphuncular Tube in Some Maastrichtian Ammonites. Koppenhagen, 1968.

MLA (9th ed.) Citation

Birkelund, Tove, and H. J. Hansen. Early Shell Growth and Stuctures of the Septa and the Siphuncular Tube in Some Maastrichtian Ammonites. 1968.