Mantle 1921,第371頁 Mantle, Burns. The Best Plays of 1920–21 and the Year Book of the Drama in America. Boston: Small, Maynard, & Company. 1921. OCLC 71401622.
Wearing 2014,第144頁 Wearing, J. P. The London Stage 1920–1929: A Calendar of Productions, Performers, and Personnel 2nd. Lanham, Maryland: Rowman & Littlefield. 2014. ISBN 978-0-8108-9301-6. OCLC 863695327.
Kitchen 2007 harvnb模板錯誤: 多個指向目標 (2個): CITEREFKitchen2007 (幫助) Kitchen, Karl K. Gold Digging on Broadway. Michigan Quarterly Review. Winter 2007, 46 (1). hdl:2027/spo.act2080.0046.102. Reprinted from Kitchen, Karl K. Gold Digging on Broadway. New York World. 1920-10-10.
MacLeod 2016,loc 3588 MacLeod, Charlotte. Had She But Known: A Biography of Mary Roberts Rinehart Kindle. New York: MysteriousPress.com/Open Road. 2016 [1994]. ISBN 978-1-5040-4256-7. OCLC 964404207.
MacLeod 2016,loc 3708 MacLeod, Charlotte. Had She But Known: A Biography of Mary Roberts Rinehart Kindle. New York: MysteriousPress.com/Open Road. 2016 [1994]. ISBN 978-1-5040-4256-7. OCLC 964404207.
MacLeod 2016,loc 3783-3792 MacLeod, Charlotte. Had She But Known: A Biography of Mary Roberts Rinehart Kindle. New York: MysteriousPress.com/Open Road. 2016 [1994]. ISBN 978-1-5040-4256-7. OCLC 964404207.
Nissen 2016,第41-42頁 Nissen, Axel. Accustomed to Her Face: Thirty-Five Character Actresses of Golden Age Hollywood. Jefferson, North Carolina: McFarland. 2016. ISBN 978-0-7864-9732-4. OCLC 965940861.
Mantle 1921,第371頁 Mantle, Burns. The Best Plays of 1920–21 and the Year Book of the Drama in America. Boston: Small, Maynard, & Company. 1921. OCLC 71401622.
Wearing 2014,第144頁 Wearing, J. P. The London Stage 1920–1929: A Calendar of Productions, Performers, and Personnel 2nd. Lanham, Maryland: Rowman & Littlefield. 2014. ISBN 978-0-8108-9301-6. OCLC 863695327.
Kabatchnik 2009,第277頁 Kabatchnik, Amnon. Blood on the Stage: Milestone Plays of Crime, Mystery, and Detection: An Annotated Repertoire, 1900–1925. Lanham, Maryland: Scarecrow Press. 2009. ISBN 978-0-8108-6123-7. OCLC 190860037.
Kabatchnik 2009,第276頁 Kabatchnik, Amnon. Blood on the Stage: Milestone Plays of Crime, Mystery, and Detection: An Annotated Repertoire, 1900–1925. Lanham, Maryland: Scarecrow Press. 2009. ISBN 978-0-8108-6123-7. OCLC 190860037.
MacLeod 2016,loc 3822-3827 MacLeod, Charlotte. Had She But Known: A Biography of Mary Roberts Rinehart Kindle. New York: MysteriousPress.com/Open Road. 2016 [1994]. ISBN 978-1-5040-4256-7. OCLC 964404207.
Kabatchnik 2009,第278頁 Kabatchnik, Amnon. Blood on the Stage: Milestone Plays of Crime, Mystery, and Detection: An Annotated Repertoire, 1900–1925. Lanham, Maryland: Scarecrow Press. 2009. ISBN 978-0-8108-6123-7. OCLC 190860037.
Nathans 2010,第58頁 Nathans, Heather. Bat, The. Bryer, Jackson R. & Hartig, Mary C. (编). The Facts on File Companion to American Drama 2nd. New York: Facts on File. 2010. ISBN 978-0-8160-7748-9. OCLC 642206213.
MacQueen 2010,第90-91頁 MacQueen, Scott. The Twilight World of Roland West. Tibbetts, John C. & Welsh, James M. (编). American Classic Screen Features. Lanham, Maryland: Scarecrow Press. 2010: 84–91. ISBN 978-0-8108-7678-1. OCLC 939038742.
Klünder 1991,第528,536頁 Klünder, Achim (编). Encyclopedia of Television Plays in German Speaking Europe, 1978–1987: Volume 2. Munich: K G Saur. 1991. ISBN 3-598-10836-2. OCLC 468103594.
Mann 2004,第68頁 Mann, Thomas. Horror and Mystery Photoplay Editions and Magazine Fictionizations: The Catalog of a Collection. Jefferson, North Carolina: McFarland. 2004. ISBN 0-7864-1722-6. OCLC 54408114.