According to Silva (Silva, T. 1991) there are at least fo...

Controlled Composition, Current-Traditional Rhetoric, the Process Approach , and English for Specific Purposes.

Writing Approach, Controlled Rhetoric, Comprehension Approach, and Current Traditional Approach.

Writing Instruction Process, Writing Approach, the Process Approach, and the Discourse Process.

Current-Traditional Rhetoric, Theoretical Writing Approach, the Process Approach, and the Writing Process.