HARRISON. E. R. (2014). FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS- VIII ( TEACHER'S MANUAL ). FRANK BROS & CO.
Lua i Stíl Chicago (17ú heag.)HARRISON. E. R. FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS- VIII ( TEACHER'S MANUAL ). FRANK BROS & CO, 2014.
Lua MLA (9ú heag.)HARRISON. E. R. FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS- VIII ( TEACHER'S MANUAL ). FRANK BROS & CO, 2014.
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