Gaya APA
Heafford, Philip. (1987).
Great book of math puzzles .
New York:
Sterling Publishing Co.Inc.
Gaya Chicago
Heafford, Philip.
Great book of math puzzles.
New York:
Sterling Publishing Co.Inc,
1987.
Text.
Gaya MLA
Heafford, Philip.
Great book of math puzzles.
New York:
Sterling Publishing Co.Inc,
1987.
Text.
Gaya Turabian
Heafford, Philip.
Great book of math puzzles.
New York:
Sterling Publishing Co.Inc,
1987.
Print.