Sobrielo, A. (1972). A proposed English studies programme for the new certificate-in-education course at the Teacher's Training College, Singapore. s.n.].
Chicago-referens (17:e uppl.)Sobrielo, Amy. A Proposed English Studies Programme for the New Certificate-in-education Course at the Teacher's Training College, Singapore. [Quezon City: s.n.], 1972.
MLA-referens (9:e uppl.)Sobrielo, Amy. A Proposed English Studies Programme for the New Certificate-in-education Course at the Teacher's Training College, Singapore. s.n.], 1972.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.