APA (7th ed.) Citation

Aspen Executives Program & Aspen Institute for Humanistic Studies. Committee for Aspen Program Reading. (1900). Aspen Program first [and] second week readings. [Encyclopaedia Britannica].

Chicago Style (17th ed.) Citation

Aspen Executives Program and Aspen Institute for Humanistic Studies. Committee for Aspen Program Reading. Aspen Program First [and] Second Week Readings. [Chicago?]: [Encyclopaedia Britannica], 1900.

MLA (9th ed.) Citation

Aspen Executives Program and Aspen Institute for Humanistic Studies. Committee for Aspen Program Reading. Aspen Program First [and] Second Week Readings. [Encyclopaedia Britannica], 1900.