1. California Achievement Test, Level 3. Ernest W. Tiegs and Willis W. Clark. Monterey, California: CTB/McGraw-Hill, 1970.
2. Dolch, Edward W. A Basic Sight Vocabulary.Elementary School Journal, 1936,36, 456–60.
3. Reading Comprehension System: Teacher’s Manual, Minneapolis: Control Data Corporation, 1980.
4. Rogers, Carl.Freedom to Learn. Columbus, Ohio: Charles E. Merrill Press, 1969.