Gaya APA
Heyen, Neil, Vaughan, Andrew. (1994).
Giving business presentations stand and delivery: longman american business english skills .
Longman:
Essex.
Gaya Chicago
Heyen, Neil, Vaughan, Andrew.
Giving business presentations stand and delivery: longman american business english skills.
Longman:
Essex,
1994.
Text.
Gaya MLA
Heyen, Neil, Vaughan, Andrew.
Giving business presentations stand and delivery: longman american business english skills.
Longman:
Essex,
1994.
Text.
Gaya Turabian
Heyen, Neil, Vaughan, Andrew.
Giving business presentations stand and delivery: longman american business english skills.
Longman:
Essex,
1994.
Print.