APA

Merrill P., . (1997). Do it right the second time. Estados Unidos: Productivity Press.

Chicago

Merrill Peter, . 1997. Do it right the second time. Estados Unidos: Productivity Press.

Harvard

Merrill P., . (1997). Do it right the second time. Estados Unidos: Productivity Press.

MLA

Merrill Peter, . Do it right the second time. Estados Unidos: Productivity Press. 1997.