APA (7e ed.) Bronvermelding

Blanco, N. (1973). A study of the proficiency levels of the seniors of seven high schools of Laoag City in mathematics during the school year 1971-1972. s.n.].

Chicago (17e ed.) Bronvermelding

Blanco, Nenita. A Study of the Proficiency Levels of the Seniors of Seven High Schools of Laoag City in Mathematics During the School Year 1971-1972. [Quezon City: s.n.], 1973.

MLA (9e ed.) Bronvermelding

Blanco, Nenita. A Study of the Proficiency Levels of the Seniors of Seven High Schools of Laoag City in Mathematics During the School Year 1971-1972. s.n.], 1973.