General Certificate of Secondary Education & Suffolk County Council. (1987). Co-ordinated science lesson notes: Biology. Collins Educational.
Citace podle Chicago (17th ed.)General Certificate of Secondary Education a Suffolk County Council. Co-ordinated Science Lesson Notes: Biology. London: Collins Educational, 1987.
Citace podle MLA (9th ed.)General Certificate of Secondary Education a Suffolk County Council. Co-ordinated Science Lesson Notes: Biology. Collins Educational, 1987.
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