Cita APA (7a ed.)

Tan, M. (1973). The use of an improvised overhead projector to save on chemicals and time. s.n.].

Cita Chicago Style (17a ed.)

Tan, Merle. The Use of an Improvised Overhead Projector to Save on Chemicals and Time. [Quezon City: s.n.], 1973.

Cita MLA (9a ed.)

Tan, Merle. The Use of an Improvised Overhead Projector to Save on Chemicals and Time. s.n.], 1973.