APA (7th ed.) Citation

(1968). Progress to Vantage: Workbook (with key). Summertown Publishing.

Chicago Style (17th ed.) Citation

Progress to Vantage: Workbook (with Key). Summertown: Summertown Publishing, 1968.

MLA (9th ed.) Citation

Progress to Vantage: Workbook (with Key). Summertown Publishing, 1968.

Warning: These citations may not always be 100% accurate.