Cita APA (7th ed.)

McTighe, J., & Wiggins, G. P. (2013). Essential questions: Opening doors to student understanding. ASCD.

Cita Chicago (17th ed.)

McTighe, Jay, i Grant P. Wiggins. Essential Questions: Opening Doors to Student Understanding. Alexandria, Va.: ASCD, 2013.

Cita MLA (9th ed.)

McTighe, Jay, i Grant P. Wiggins. Essential Questions: Opening Doors to Student Understanding. ASCD, 2013.