"C" Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993); "dee", op. cit.
↑"La Pronunciación (Student Speak) | Influence of English "z" in Spanish Pronunciation." Language Exchange - Expose Your Mind. Web. [1].
↑"La Pronunciación (Student Speak) | Influence of English "z" in Spanish Pronunciation." Language Exchange - Expose Your Mind. Web. [2]เก็บถาวร 2010-06-13 ที่ เวย์แบ็กแมชชีน.