Gaya APA
Johnston, C.L., Willis, Alden T., Hughes, Gale M.. (1984).
Essential arithmetic (4th ed).
Belmont, CA:
Wadsworth.
Gaya Chicago
Johnston, C.L., Willis, Alden T., Hughes, Gale M..
Essential arithmetic.
4th ed
Belmont, CA:
Wadsworth,
1984.
Text.
Gaya MLA
Johnston, C.L., Willis, Alden T., Hughes, Gale M..
Essential arithmetic.
4th ed
Belmont, CA:
Wadsworth,
1984.
Text.
Gaya Turabian
Johnston, C.L., Willis, Alden T., Hughes, Gale M..
Essential arithmetic.
4th ed
Belmont, CA:
Wadsworth,
1984.
Print.