APA-viite (7. p.)
Heavilin, B. A. (2013). From an existential vacuum to a tragic optimism: The search for meaning and presence of god in modern literature. Cambridge Scholars Publishing.
Chicago-viite (17. p.)
Heavilin, Barbara A. From an Existential Vacuum to a Tragic Optimism: The Search for Meaning and Presence of God in Modern Literature. Newcastle upon Tyne, England: Cambridge Scholars Publishing, 2013.
MLA-viite (9. p.)
Heavilin, Barbara A. From an Existential Vacuum to a Tragic Optimism: The Search for Meaning and Presence of God in Modern Literature. Cambridge Scholars Publishing, 2013.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.