Lua APA (7ú heag.)

ebrary, Inc, & Sahay, B. S. (2006). 3PL, 4PL and reverse logistics, part 2. Emerald Group Publishing.

Lua i Stíl Chicago (17ú heag.)

ebrary, Inc, agus B. S. Sahay. 3PL, 4PL and Reverse Logistics, Part 2. Bradford, England: Emerald Group Publishing, 2006.

Lua MLA (9ú heag.)

ebrary, Inc, agus B. S. Sahay. 3PL, 4PL and Reverse Logistics, Part 2. Emerald Group Publishing, 2006.

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