Avoiding common pediatric errors
edited by Anthony D. Slonim
Wolters Kluwer, 2008
 Buku Teks
Summers, Della
Longman active study dictionary
Pearson Education Limited, 2010
 Multimedia
Longman dictionary contemporary English
chief editor, Paul Procter
Longman, 1982
 Buku Referensi
Longman Dictionary of Contemporary English
Pearson Longman, 2006
 Buku Referensi
Longman active study dictionary
Pearson Education Limited, 2010
 Buku Referensi