APA

Herkströter C., Shell, Nymphenburg Talk (1996 j. 1. . M. & Shell. (1996). A continuing contribution -oil and gas in the 21st century. [s.l.]: Shell.

Chicago

Herkströter C.A.J, Shell, Nymphenburg Talk (1996 jun 19 Munich) and Shell. 1996. A continuing contribution -oil and gas in the 21st century. [s.l.]: Shell.

Harvard

Herkströter C., Shell, Nymphenburg Talk (1996 j. 1. . M. and Shell. (1996). A continuing contribution -oil and gas in the 21st century. [s.l.]: Shell.

MLA

Herkströter C.A.J, Shell, Nymphenburg Talk (1996 jun 19 Munich) and Shell. A continuing contribution -oil and gas in the 21st century. [s.l.]: Shell. 1996.