Arnold, S. L. (1916). The mastery of words: Book four of the see and say series : a series of lessons based upon the ordinary essential vocabulary, to secure for the pupil prompt recognition of words, accurate spelling, and the power to help himself in the study of words. Syracuse, N.Y.: Iroquois Publishing Co..

Arnold, Sarah Louise. The Mastery of Words: Book Four of the See and Say Series : A Series of Lessons Based Upon the Ordinary Essential Vocabulary, to Secure for the Pupil Prompt Recognition of Words, Accurate Spelling, and the Power to Help Himself in the Study of Words. Syracuse, N.Y.: Iroquois Publishing Co., 1916.

Arnold, Sarah Louise. The Mastery of Words: Book Four of the See and Say Series : A Series of Lessons Based Upon the Ordinary Essential Vocabulary, to Secure for the Pupil Prompt Recognition of Words, Accurate Spelling, and the Power to Help Himself in the Study of Words. Syracuse, N.Y.: Iroquois Publishing Co., 1916.