HARRISON. E. R. (2013). FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS-VI. FRANK BROS & CO.
Cita Chicago (17th ed.)HARRISON. E. R. FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS-VI. FRANK BROS & CO, 2013.
Cita MLA (9th ed.)HARRISON. E. R. FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS-VI. FRANK BROS & CO, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.