Cita APA (7a ed.)

Hjorland, B. (1997). Information seeking and subject representation: An activity-theoretical approach to information science (1st. ed.). Greenwood.

Cita Chicago Style (17a ed.)

Hjorland, Birger. Information Seeking and Subject Representation: An Activity-theoretical Approach to Information Science. 1st. ed. Westport: Greenwood, 1997.

Cita MLA (8a ed.)

Hjorland, Birger. Information Seeking and Subject Representation: An Activity-theoretical Approach to Information Science. 1st. ed. Greenwood, 1997.