Peters, Wilhelmus Antonius Maria
Gerard Manley Hopkins : a critical essay towards the understanding of his poetry / W.A.M. Peters
Oxford University Press, 1947
 Buku Teks SO
Poetry
Chicago : The Modern Poetry Association
 Majalah, Jurnal, Buletin
Hyde, Simeon
Composition of the essay
Addison-Wesley, 1967
 Buku Teks SO
Portnoy, Ethel
Genietingen essay
Meulenhoff, 1998
 Buku Teks
The art of the essay
edited by Leslie A. Fiedler
Thomas Y. Crowell, 1958
 Buku Teks SO