APA (7e ed.) Bronvermelding

Journal of the Bulgarian Geographical Society | Bulgarian Geographical Society. Cambridge University Press.

Chicago (17e ed.) Bronvermelding

Journal of the Bulgarian Geographical Society | Bulgarian Geographical Society. Cambridge University Press.

MLA (8e ed.) Bronvermelding

Journal of the Bulgarian Geographical Society | Bulgarian Geographical Society. Cambridge University Press.

Let op: Deze citaties zijn niet altijd 100% accuraat.