Source: Sedra & Smith, Microelectronics, 4th Ed.
Note: This is the same information in your text, where G=Af, Go=A, β=H (note that β is NOT gain here),ε=xi, C=xo, Y=xf, & R=xs.
Series-Shunt (Voltage Feedback-Voltage Subtraction)
Shunt-Series (Current Feedback-Current Subtraction)
Series-Series (Current Feedback-Voltage Subtraction)
Shunt-Shunt (Voltage Feedback-Current Subtraction)
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