Citazione Stile APA (7a Edizione)

HARDWICK, H. (2003). WORDS ARE IMPORTANT- BOOK 4 (1st.). WHEELER PUBLISHING.

Citazione stile Chigago Style (17a edizione)

HARDWICK, H.C. WORDS ARE IMPORTANT- BOOK 4. 1st. ALLAHABAD: WHEELER PUBLISHING, 2003.

Citatione MLA (9a ed.)

HARDWICK, H.C. WORDS ARE IMPORTANT- BOOK 4. 1st. WHEELER PUBLISHING, 2003.