Gaya APA

Swanson, C, P., H., I, H, R. (1975). Programmed learning aid for supervision . Amerika: Amerika: Learning Systems Company; 1975.

Gaya MLA

Swanson, Carl, P.., H., I., Hermanson,, Roger. "Programmed learning aid for supervision". Amerika: Amerika: Learning Systems Company; 1975, 1975. Text.