APA (7th ed.) Citation

Wales, A. P., Koesche, G., & Korer, J. (1970). World directory of booksellers: An international guide to booksellers. Alexander P. Wales.

Chicago Style (17th ed.) Citation

Wales, Alexander Peter, Gisella Koesche, and Jacqueline Korer. World Directory of Booksellers: An International Guide to Booksellers. London: Alexander P. Wales, 1970.

MLA (9th ed.) Citation

Wales, Alexander Peter, et al. World Directory of Booksellers: An International Guide to Booksellers. Alexander P. Wales, 1970.