Gaya APA
Benjamin, A., Shermer, M, B. (1991).
Teach your child math : making math fun for the both of you .
Los Angeles:
Lowell House.
Gaya MLA
Benjamin, Arthur., Shermer, Michael, Brant.
"Teach your child math : making math fun for the both of you".
Los Angeles:
Lowell House,
1991.
Text.