Παραπομπή APA

Kuper, J. (1994). Sustainable development of scots pine forests. Wageningen Agricultural University.

Παραπομπή Chicago Style

Kuper, J.H. Sustainable Development of Scots Pine Forests. Netherlands: Wageningen Agricultural University, 1994.

Παραπομπή MLA

Kuper, J.H. Sustainable Development of Scots Pine Forests. Wageningen Agricultural University, 1994.