Alaska mailing souvenir.
MLA
Alaska Mailing Souvenir. [Case & Draper and H.C. Barley?], 0AD. https://collections.library.yale.edu/catalog/17370752.
APA, 6th edition
Alaska mailing souvenir. (0 C.E.). [Viewbooks--Alaska--1900]. [Case & Draper and H.C. Barley?]. https://collections.library.yale.edu/catalog/17370752.