Smith, R. K., Johnson, B., & Mohr, C. (1998). Groundwork for a better vocabulary (2nd ed.; instructor's ed.). Townsend Press.
Cita Chicago (17th ed.)Smith, R. Kent, Beth Johnson, i Carole Mohr. Groundwork for a Better Vocabulary. 2nd ed.; instructor's ed. Marlton, NJ: Townsend Press, 1998.
Cita MLA (9th ed.)Smith, R. Kent, et al. Groundwork for a Better Vocabulary. 2nd ed.; instructor's ed. Townsend Press, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.