Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (2020). Petroleum Age and Service Station Merchandising. Petroleum Age Publishing Company.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. Petroleum Age and Service Station Merchandising. Chicago, Ill: Petroleum Age Publishing Company, 2020.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. Petroleum Age and Service Station Merchandising. Petroleum Age Publishing Company, 2020.

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