Παραπομπή σε μορφή APA (7η εκδ.)

(1940). The Johns Hopikins University circular, June, 1940: School of Hygiene and Public Health : catalogue number 1940-1941. Johns Hopkins University.

Παραπομπή σε μορφή Chicago (17η εκδ.)

The Johns Hopikins University Circular, June, 1940: School of Hygiene and Public Health : Catalogue Number 1940-1941. Baltimore: Johns Hopkins University, 1940.

Παραπομπή σε μορφή MLA (8th εκδ.)

The Johns Hopikins University Circular, June, 1940: School of Hygiene and Public Health : Catalogue Number 1940-1941. Johns Hopkins University, 1940.