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Penrose, John M., Rasberry, Robert J.. (2004). BUSINESS COMMUNICATION FOR MANAGERS (5th). Andover: SOUTH-WESTERN CENGAGE LEARNING.

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Penrose, John M., Rasberry, Robert J.. BUSINESS COMMUNICATION FOR MANAGERS. 5th Andover: SOUTH-WESTERN CENGAGE LEARNING, 2004. Text.

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Penrose, John M., Rasberry, Robert J.. BUSINESS COMMUNICATION FOR MANAGERS. 5th Andover: SOUTH-WESTERN CENGAGE LEARNING, 2004. Text.

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Penrose, John M., Rasberry, Robert J.. BUSINESS COMMUNICATION FOR MANAGERS. 5th Andover: SOUTH-WESTERN CENGAGE LEARNING, 2004. Print.