Finkel, L. S., Krawitz, R., Morton, L., White, S. G., Ilene, G., & Gutman, I. (1970). Learning English as a second language: Workbook. Oceana Pub..

Finkel, Lawrence S., Ruth Krawitz, Lois Morton, Sheilah Golden White, Glassman Ilene, and Ilene Gutman. Learning English as a Second Language: Workbook. Dobbs Ferry: Oceana Pub., 1970.

Finkel, Lawrence S., et al. Learning English as a Second Language: Workbook. Oceana Pub., 1970.