Gaya APA
HECKENBACH, A, J., KEGLEY, J, C.
(1970).
Elementary functions :
.
London:
Macmillan.
Gaya MLA
HECKENBACH, Alan, J.., KEGLEY, J., Colby.
"Elementary functions :".
London:
Macmillan,
1970.
Buku.