APA (7th ed.) Citation

Perera, S. (1991). English for G.C.E. students, English teachers exams, exams, office workers. Author.

Chicago Style (17th ed.) Citation

Perera, S.N. English for G.C.E. Students, English Teachers Exams, Exams, Office Workers. Maggona: Author, 1991.

MLA (9th ed.) Citation

Perera, S.N. English for G.C.E. Students, English Teachers Exams, Exams, Office Workers. Author, 1991.