APA (7th ed.) Citation

Hammond Incorporated & Graham, A. (1995). Basic map skills (Rev. ed.). Hammond Incorporated.

Chicago Style (17th ed.) Citation

Hammond Incorporated and Alma Graham. Basic Map Skills. Rev. ed. Maplewood, N.J.: Hammond Incorporated, 1995.

MLA (9th ed.) Citation

Hammond Incorporated and Alma Graham. Basic Map Skills. Rev. ed. Hammond Incorporated, 1995.