Gaya APA
HECKENBACH, A, J.
(1970).
Elementary functions
.
Leiden:
The Macmillan Company/ Collier - Macmillan Limited.
Gaya MLA
HECKENBACH, Alan, J.
"Elementary functions".
Leiden:
The Macmillan Company/ Collier - Macmillan Limited,
1970.
Text.