APA
Mary L Rush, . (1975). The Language of classifications : animals : a programmed book. The Alexander Graham Bell Asso. for the Deaf, Washington: .
Chicago
Mary L Rush, . 1975. The Language of classifications : animals : a programmed book. The Alexander Graham Bell Asso. for the Deaf, Washington: .
Harvard
Mary L Rush, . (1975). The Language of classifications : animals : a programmed book. The Alexander Graham Bell Asso. for the Deaf, Washington: .
MLA
Mary L Rush, . The Language of classifications : animals : a programmed book. The Alexander Graham Bell Asso. for the Deaf, Washington: . 1975.