APA

GONZALEZ L. J., . (1995). Pleasure in problem solving. México: .

Chicago

GONZALEZ Luis Jorge, . 1995. Pleasure in problem solving. México: .

Harvard

GONZALEZ L. J., . (1995). Pleasure in problem solving. México: .

MLA

GONZALEZ Luis Jorge, . Pleasure in problem solving. México: . 1995.