Kerkering, J. D. Theories of poetry: John D. Kerkering. The nineteenth century, c. 1830 - 1914.(2013).

Kerkering, John D. "Theories of Poetry: John D. Kerkering." The Nineteenth Century, C. 1830 - 1914.(2013) .

Kerkering, John D. "Theories of Poetry: John D. Kerkering." The Nineteenth Century, C. 1830 - 1914.(2013), .