Παραπομπή σε μορφή APA (7η εκδ.)

Spellrberg, I. F. (1996). Evaluation and assessment for conservation: Ecological guidelines for determining priorities for nature conservation. Chapman & Hall.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Spellrberg, Ian F. Evaluation and Assessment for Conservation: Ecological Guidelines for Determining Priorities for Nature Conservation. London: Chapman & Hall, 1996.

Παραπομπή σε μορφή MLA (8th εκδ.)

Spellrberg, Ian F. Evaluation and Assessment for Conservation: Ecological Guidelines for Determining Priorities for Nature Conservation. Chapman & Hall, 1996.