APA (7. basım) Alıntı

Olsen, L. Tracks and signs of the animals and birds of Britain and Europe.

Chicago Style (17. basım) Atıf

Olsen, Lars-Henrik. Tracks and Signs of the Animals and Birds of Britain and Europe.

MLA (9th ed.) Atıf

Olsen, Lars-Henrik. Tracks and Signs of the Animals and Birds of Britain and Europe.