APA (7th ed.) Citation

Gerritsen, G. J., & Lok, J. (1986). Vogels in de Ijsseldelta.

Chicago Style (17th ed.) Citation

Gerritsen, Gerrit J., and Jan Lok. Vogels in De Ijsseldelta. Kampen, 1986.

MLA (9th ed.) Citation

Gerritsen, Gerrit J., and Jan Lok. Vogels in De Ijsseldelta. 1986.

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