Olson, M. C., Zelliot, E. A., & Leidner, W. E. (1961). Teacher's manual and key: Introductory bookkeeping. Third edition. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Olson, Milton C., Ernest Adolph Zelliot, agus Walter E. Leidner. Teacher's Manual and Key: Introductory Bookkeeping. Third Edition. Englewood Cliffs, N.J.: Prentice-Hall, 1961.
Lua MLA (8ú heag.)Olson, Milton C., et al. Teacher's Manual and Key: Introductory Bookkeeping. Third Edition. Prentice-Hall, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.