Cita APA (7a ed.)

Lewis, C. S. (1994). A grief observed (First HarperCollins paperback edition published in 1994.). HarperOne.

Cita Chicago Style (17a ed.)

Lewis, C. S. A Grief Observed. First HarperCollins paperback edition published in 1994. [New York]: HarperOne, 1994.

Cita MLA (9a ed.)

Lewis, C. S. A Grief Observed. First HarperCollins paperback edition published in 1994. HarperOne, 1994.