Gaya APA
Honsberger, R. ().
In Polya's Footsteps Miscellaneous Problems and Essays (Cetakan I).
America:
The Mathematical Assocation of Ameria.
Gaya MLA
Honsberger, Ross.
"In Polya's Footsteps Miscellaneous Problems and Essays".
Cetakan I
America:
The Mathematical Assocation of Ameria,
.
Penunjang.