Gaya APA

PARSHALL, STEVEN A., PENA, WILLIAM M.. (2001). Problem seeking (4). New York: John Wiley.

Gaya Chicago

PARSHALL, STEVEN A., PENA, WILLIAM M.. Problem seeking. 4 New York: John Wiley, 2001. Text.

Gaya MLA

PARSHALL, STEVEN A., PENA, WILLIAM M.. Problem seeking. 4 New York: John Wiley, 2001. Text.

Gaya Turabian

PARSHALL, STEVEN A., PENA, WILLIAM M.. Problem seeking. 4 New York: John Wiley, 2001. Print.