(e.) Twin Gabriel : Die Namen : (program in progress).

MLA

(e.) Twin Gabriel : Die Namen : (program In Progress). Berlin: [s.n.], 1990.

APA

(1990). (e.) Twin Gabriel : Die Namen : (program in progress). Berlin: [s.n.].

Chicago

(e.) Twin Gabriel: Die Namen : (program In Progress). Berlin: [s.n.], 1990.