Παραπομπή σε μορφή APA (7η εκδ.)

Howe, D. P. (1870). Howe's science of language, or, Seven-hour system of grammar. C.F. Livingston's Printing House.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Howe, D. P. Howe's Science of Language, or, Seven-hour System of Grammar. Manchester: C.F. Livingston's Printing House, 1870.

Παραπομπή σε μορφή MLA (8th εκδ.)

Howe, D. P. Howe's Science of Language, or, Seven-hour System of Grammar. C.F. Livingston's Printing House, 1870.