Gaya APA
Leech, C.
().
Passport to Mathematics Book 1 : Problem of The Day
.
Boston:
Mc Daugal Littell, 1999.
Gaya MLA
Leech, Cheryl.
"Passport to Mathematics Book 1 : Problem of The Day".
Boston:
Mc Daugal Littell, 1999,
.
Text.