Cita APA (7a ed.)

HARRISON. E. R. (2012). FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL WORKBOOK CLASS- 7 ( 2013- 14 ). FRANK BROS.

Cita Chicago Style (17a ed.)

HARRISON. E. R. FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL WORKBOOK CLASS- 7 ( 2013- 14 ). FRANK BROS, 2012.

Cita MLA (9a ed.)

HARRISON. E. R. FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL WORKBOOK CLASS- 7 ( 2013- 14 ). FRANK BROS, 2012.