Gaya APA
Llewellyn, G, G, &, S. (1987).
Mathematics-A Revision and Reference Guide for First Examinations (1).
England:
Stanley Thornes Ltd.
Gaya MLA
Llewellyn, G, Godfrey, &, S.
"Mathematics-A Revision and Reference Guide for First Examinations".
1
England:
Stanley Thornes Ltd,
1987.
Buku Analog.