Gaya APA
Andreescu, R, G, &, T. (2007).
Advanced book on Mathematics Olympiad (-).
USA:
Springer Science Business Media, LLC.
Gaya MLA
Andreescu, R˘azvan, Gelca, &, Titu.
"Advanced book on Mathematics Olympiad".
-
USA:
Springer Science Business Media, LLC,
2007.
Electronic Resource.