Citazione Stile APA (7a Edizione)

Roberts, M. (1980). The ancient world (Resource sheets, 1. publ.). MacMillan.

Citazione stile Chigago Style (17a edizione)

Roberts, Martin. The Ancient World. Resource sheets, 1. publ. London [u.a.]: MacMillan, 1980.

Citatione MLA (9a ed.)

Roberts, Martin. The Ancient World. Resource sheets, 1. publ. MacMillan, 1980.