APA aipamena

Sandberg Sheryl. (2017). Option B Facing Adeversity. Penguin.

Chicago Style aipamena

Sandberg Sheryl. Option B Facing Adeversity. Penguin, 2017.

MLA aipamena

Sandberg Sheryl. Option B Facing Adeversity. Penguin, 2017.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.