APA-referens (7:e uppl.)

Opetina, L. N. (2012). The novel way of learning grammar. Mindshapers Co.

Chicago-referens (17:e uppl.)

Opetina, Leandro N. The Novel Way of Learning Grammar. Manila: Mindshapers Co, 2012.

MLA-referens (9:e uppl.)

Opetina, Leandro N. The Novel Way of Learning Grammar. Mindshapers Co, 2012.