"Poets Militant" . A treasury of war poetry, British and American poems of the world war, 1914–1919 – via Wikisource.
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Pescatello, Ann M. (1992). Charles Seeger: A Life in American Music. Pittsburgh: University of Pittsburgh Press. pp. 4–5. ISBN978-0822976851. OCLC652395660.
Homberger, Eric (1989). "Alan Seeger: 1888–1916". In Cross, Tim (ed.). The Lost Voices of World War I: An International Anthology of Writers, Poets & Playwrights. Iowa City: University of Iowa Press. ISBN0877452644. OCLC21396041.