Παραπομπή APA

Swick, E. (2005). Practice makes perfect English pronouns and prepositions. New York: McGraw Hill.

Παραπομπή Chicago Style

Swick, Ed. Practice Makes Perfect English Pronouns and Prepositions. New York: McGraw Hill, 2005.

Παραπομπή MLA

Swick, Ed. Practice Makes Perfect English Pronouns and Prepositions. New York: McGraw Hill, 2005.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.