Cita APA (7a ed.)

Wagner, C. (1912). An experimental study of grouping by similarity as a factor in the teaching of spelling. Univ. of Pennsylvania.

Cita Chicago Style (17a ed.)

Wagner, Charles. An Experimental Study of Grouping by Similarity as a Factor in the Teaching of Spelling. Univ. of Pennsylvania, 1912.

Cita MLA (9a ed.)

Wagner, Charles. An Experimental Study of Grouping by Similarity as a Factor in the Teaching of Spelling. Univ. of Pennsylvania, 1912.