APA (7. basım) Alıntı
Haapanen, A., Helminen, M., & Suomalainen, H. K. (1973). Population growth and breeding biology of the whooper swan, Cygnus C. Cygnus, in Finland in 1950-1970.
Chicago Style (17. basım) Atıf
Haapanen, Antti, Matti Helminen, ve Hannu K. Suomalainen. Population Growth and Breeding Biology of the Whooper Swan, Cygnus C. Cygnus, in Finland in 1950-1970. 1973.
MLA (9th ed.) Atıf
Haapanen, Antti, et al. Population Growth and Breeding Biology of the Whooper Swan, Cygnus C. Cygnus, in Finland in 1950-1970. 1973.
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