APA (7e ed.) Bronvermelding

Dennis, F. A. 2., & Castleton, D. A. 2. (1989). Case studies in population and natural resource: Costa Rica. [S.l.] , [S.l.] : [S.e.].

Chicago (17e ed.) Bronvermelding

Dennis, Frances Autoría 26056, en Dulce Autora 26057 Castleton. Case Studies in Population and Natural Resource: Costa Rica. [S.l.] , [S.l.] : [S.e.], 1989.

MLA (9e ed.) Bronvermelding

Dennis, Frances Autoría 26056, en Dulce Autora 26057 Castleton. Case Studies in Population and Natural Resource: Costa Rica. [S.l.] , [S.l.] : [S.e.], 1989.