KOTTMEYER, W., & CLAUS, A. (1976). Basic goals in spelling.-- 5th ed. McGraw-Hill Book.

KOTTMEYER, William, and Audrey CLAUS. Basic Goals in Spelling.-- 5th Ed. New York: McGraw-Hill Book, 1976.

KOTTMEYER, William, and Audrey CLAUS. Basic Goals in Spelling.-- 5th Ed. McGraw-Hill Book, 1976.