Παραπομπή σε μορφή APA (7η εκδ.)

Barnard, J. L., Randall, C. W., & Stensel, H. D. (1992). Design and retrofit of wastewater treatment plants for biological nutrient removal. Technomic Publishing.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Barnard, James L., Clifford W. Randall, και H. David Stensel. Design and Retrofit of Wastewater Treatment Plants for Biological Nutrient Removal. Lancaster: Technomic Publishing, 1992.

Παραπομπή σε μορφή MLA (8th εκδ.)

Barnard, James L., et al. Design and Retrofit of Wastewater Treatment Plants for Biological Nutrient Removal. Technomic Publishing, 1992.