APA-viite (7. p.)
Carattoli, M. C. (2000). Nature & Environment: Plus Activities Level Two (1a. ed.). Richmond Publishing.
Chicago-viite (17. p.)
Carattoli, María Cecilia. Nature & Environment: Plus Activities Level Two. 1a. ed. Buenos Aires: Richmond Publishing, 2000.
MLA-viite (9. p.)
Carattoli, María Cecilia. Nature & Environment: Plus Activities Level Two. 1a. ed. Richmond Publishing, 2000.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.