Gale Group, Long, S., Jacques, D., & Kepos, P. (2016). International directory of company histories. St. James Press, a part of Gale, Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Gale Group, Steven Long, Derek Jacques, agus Paula Kepos. International Directory of Company Histories. Farmington Hills, Michigan: St. James Press, a part of Gale, Cengage Learning, 2016.
Lua MLA (9ú heag.)Gale Group, et al. International Directory of Company Histories. St. James Press, a part of Gale, Cengage Learning, 2016.
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