Trích dẫn APA

Bijkerk,C. (1975). Recreation values of forests and parks. Institute for land and water management research.

Trích dẫn kiểu Chicago

Bijkerk,C. Recreation Values of Forests and Parks. Netherlands: Institute for land and water management research, 1975.

Trích dẫn MLA

Bijkerk,C. Recreation Values of Forests and Parks. Institute for land and water management research, 1975.

Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.