Changes Intro - Workbook by Jack C. Richards

Changes Intro - Class cassette set by Jack C. Richards, Jonathan Hull (Contributor), Susan Proctor (Contributor)

Changes 1 - Student's Book by Jack C. Richards (Editor), Jonathan Hull (Editor), Susan Proctor (Editor)

Changes 1 - Teacher's Book by Jack C. Richards, Jonathan Hull, Susan Proctor, David Haines

Changes 1 - Workbook by Jack C. Richards, Jonathan Hull (Contributor)

Changes 1 - Class cassette set by Jack C. Richards, Jonathan Hull, Susan Proctor, David Haines

Changes 2 - Student's Book by Jack C. Richards (Editor), Jonathan Hull (Editor), David Haines (Editor)

Changes 2 - Teacher's Book by Jack C. Richards, Jonathan Hull, Susan Proctor, David Haines

Changes 2 - Workbook by Jack C. Richards, Jonathan Hull (Contributor), Susan Proctor (Contributor)

Changes 2 - Student's Cassette by Jack C. Richards, Jonathan Hull (Contributor), Susan Proctor (Contributor)

Changes 3 - Workbook by Jack C. Richards, Jonathan Hull, Susan Proctor, David Haines