APA (7th ed.) Citation

Nielsen, J. G. (1969). Systematics and biology of the Aphyonidae: (Pisces, Ophidioidea). Danish Science Press.

Chicago Style (17th ed.) Citation

Nielsen, Jørgen G. Systematics and Biology of the Aphyonidae: (Pisces, Ophidioidea). Copenhagen: Danish Science Press, 1969.

MLA (8th ed.) Citation

Nielsen, Jørgen G. Systematics and Biology of the Aphyonidae: (Pisces, Ophidioidea). Danish Science Press, 1969.

Warning: These citations may not always be 100% accurate.