Walbank, F. W. (1972). Polybius: By F. W. Walbank. Univ. of California Pr..
Lua i Stíl Chicago (17ú heag.)Walbank, Frank W. Polybius: By F. W. Walbank. Berkeley, Calif. [u.a.]: Univ. of California Pr., 1972.
Lua MLA (8ú heag.)Walbank, Frank W. Polybius: By F. W. Walbank. Univ. of California Pr., 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.