General Certificate of Secondary Education & Suffolk County Council. (1987). Co-ordinated science lesson notes: Biology. Collins Educational.
Chicago-referens (17:e uppl.)General Certificate of Secondary Education och Suffolk County Council. Co-ordinated Science Lesson Notes: Biology. London: Collins Educational, 1987.
MLA-referens (9:e uppl.)General Certificate of Secondary Education och Suffolk County Council. Co-ordinated Science Lesson Notes: Biology. Collins Educational, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.