Παραπομπή APA

Spanjers, H. (1993). Respirometry in activated sludge. Agricultural University.

Παραπομπή Chicago Style

Spanjers, Henri. Respirometry in Activated Sludge. Wageningen: Agricultural University, 1993.

Παραπομπή MLA

Spanjers, Henri. Respirometry in Activated Sludge. Agricultural University, 1993.