Gaya APA
Hellman, P. (2017).
You've Got 00:00:00 Seconds : Communication Secrets For a Distracted World .
United States of America:
AMACOM.
Gaya MLA
Hellman, Paul.
"You've Got 00:00:00 Seconds : Communication Secrets For a Distracted World".
United States of America:
AMACOM,
2017.
Text.