Thomas, S. E. (1965). Commerce: Its theory and practice. Cassell and company limited.
Lua i Stíl Chicago (17ú heag.)Thomas, S. Evelyn. Commerce: Its Theory and Practice. London: Cassell and company limited, 1965.
Lua MLA (9ú heag.)Thomas, S. Evelyn. Commerce: Its Theory and Practice. Cassell and company limited, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.