Benthul, H. F., Anderson, E. A., Utech, A. M., Halat, K., & Biggy, M. V. (1980). Spell correctly (Teacher's ed.). Silver Burdett.

Benthul, Herman F., Edna A. Anderson, Arlys M. Utech, Karen Halat, and M. Virginia Biggy. Spell Correctly. Teacher's ed. Morristown, N.J.: Silver Burdett, 1980.

Benthul, Herman F., et al. Spell Correctly. Teacher's ed. Silver Burdett, 1980.