Παραπομπή APA

(1977). Ecological grading and classification of land-occupation and land-use mosaics. Ottawa: Lands Directorate, Fisheries & Environment Canada.

Παραπομπή Chicago Style

Ecological Grading and Classification of Land-occupation and Land-use Mosaics. Ottawa: Lands Directorate, Fisheries & Environment Canada, 1977.

Παραπομπή MLA

Ecological Grading and Classification of Land-occupation and Land-use Mosaics. Ottawa: Lands Directorate, Fisheries & Environment Canada, 1977.

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