APA-ийн эшлэл(7 дахь хэвлэлт)

(1969). Steps to spoken english: A graded course for spanish-speaking students. Longman.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Steps to Spoken English: A Graded Course for Spanish-speaking Students. London: Longman, 1969.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Steps to Spoken English: A Graded Course for Spanish-speaking Students. Longman, 1969.