APA
Henry J. Ehlors, . (1976). Logic : modern and traditions. Ohio: Charles E. Merrill Publishing Company.
Chicago
Henry J. Ehlors, . 1976. Logic : modern and traditions. Ohio: Charles E. Merrill Publishing Company.
Harvard
Henry J. Ehlors, . (1976). Logic : modern and traditions. Ohio: Charles E. Merrill Publishing Company.
MLA
Henry J. Ehlors, . Logic : modern and traditions. Ohio: Charles E. Merrill Publishing Company. 1976.
