APA

Einstein A., Krappe A. H., Sessions R. & Strunk O. (1949). The Italian madrigal. Princeton: Princeton Univ. Press.

Chicago

Einstein Alfred, Krappe Alexander Haggerty, Sessions Roger and Strunk Oliver. 1949. The Italian madrigal. Princeton: Princeton Univ. Press.

Harvard

Einstein A., Krappe A. H., Sessions R. and Strunk O. (1949). The Italian madrigal. Princeton: Princeton Univ. Press.

MLA

Einstein Alfred, Krappe Alexander Haggerty, Sessions Roger and Strunk Oliver. The Italian madrigal. Princeton: Princeton Univ. Press. 1949.