Παραπομπή σε μορφή APA (7η εκδ.)

Sweetman, H. L. (1958). The principles of biological control; interrelation of hosts and pests and utilization in regulation of animal and plant populations. W.C. Brown Co.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sweetman, Harvey Leroy. The Principles of Biological Control; Interrelation of Hosts and Pests and Utilization in Regulation of Animal and Plant Populations. Dubuque, Iowa: W.C. Brown Co, 1958.

Παραπομπή σε μορφή MLA (9th εκδ.)

Sweetman, Harvey Leroy. The Principles of Biological Control; Interrelation of Hosts and Pests and Utilization in Regulation of Animal and Plant Populations. W.C. Brown Co, 1958.