Essential English vocabulary. Workbook for the 3,000 most frequent words (4de uitg.).

MLA

De Hert, J, and D Goyvaerts. Essential English Vocabulary. Workbook for the 3,000 Most Frequent Words (4de Uitg.). Gent, 1979.

APA

De Hert, J., & Goyvaerts, D. (1979). Essential English vocabulary. Workbook for the 3,000 most frequent words (4de uitg.). Gent.

Chicago

De Hert, J., and D Goyvaerts. Essential English Vocabulary. Workbook for the 3,000 Most Frequent Words (4de Uitg.). Gent, 1979.